sampling method for PlanckTP + Planck SZ(SZ_plus_CMB.ini)
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Zhen Pan
- Posts: 12
- Joined: August 29 2017
- Affiliation: UC Davis
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by Zhen Pan » September 21 2017
I am testing
and run
mpirun -np 6 ./cosmomc xx.ini
but it seems to be a bad choice: the chains only move 1-3 steps in the first 30 mins.
Anyone knows which sampling method to use here ?
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Antony Lewis
- Posts: 1951
- Joined: September 23 2004
- Affiliation: University of Sussex
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Contact:
Post
by Antony Lewis » September 21 2017
You can use method 1 to use standard Metropolis Hastings.
Also check your parameter propose widths: make sure they are small enough so that chain can move. (the SZ likelihood may also be slow, I'm not sure, I've not written or used it myself).
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Zhen Pan
- Posts: 12
- Joined: August 29 2017
- Affiliation: UC Davis
Post
by Zhen Pan » September 21 2017
Thank you, Antony. I am using method=1 now.